1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4Evaporation.cc,v 1.26 2010/11/23 18:10:10 vnivanch Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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29 | // |
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30 | // Hadronic Process: Nuclear De-excitations |
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31 | // by V. Lara (Oct 1998) |
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32 | // |
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33 | // Alex Howard - added protection for negative probabilities in the sum, 14/2/07 |
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34 | // |
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35 | // Modif (03 September 2008) by J. M. Quesada for external choice of inverse |
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36 | // cross section option |
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37 | // JMQ (06 September 2008) Also external choices have been added for |
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38 | // superimposed Coulomb barrier (if useSICBis set true, by default is false) |
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39 | // |
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40 | // V.Ivanchenko (27 July 2009) added G4EvaporationDefaultGEMFactory option |
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41 | // V.Ivanchenko (10 May 2010) rewrited BreakItUp method: do not make new/delete |
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42 | // photon channel first, fission second, |
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43 | // added G4UnstableFragmentBreakUp to decay |
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44 | // unphysical fragments (like 2n or 2p), |
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45 | // use Z and A integer |
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46 | |
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47 | #include "G4Evaporation.hh" |
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48 | #include "G4EvaporationFactory.hh" |
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49 | #include "G4EvaporationGEMFactory.hh" |
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50 | #include "G4EvaporationDefaultGEMFactory.hh" |
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51 | #include "G4HadronicException.hh" |
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52 | #include "G4NistManager.hh" |
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53 | |
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54 | G4Evaporation::G4Evaporation() |
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55 | { |
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56 | //theChannelFactory = new G4EvaporationFactory(); |
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57 | theChannelFactory = new G4EvaporationDefaultGEMFactory(); |
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58 | InitialiseEvaporation(); |
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59 | } |
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60 | |
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61 | G4Evaporation::G4Evaporation(std::vector<G4VEvaporationChannel*> * aChannelsVector) |
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62 | : theChannels(aChannelsVector), theChannelFactory(0), nChannels(0) |
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63 | { |
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64 | InitialiseEvaporation(); |
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65 | } |
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66 | |
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67 | G4Evaporation::~G4Evaporation() |
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68 | { |
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69 | if (theChannels != 0) { theChannels = 0; } |
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70 | if (theChannelFactory != 0) { delete theChannelFactory; } |
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71 | } |
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72 | |
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73 | void G4Evaporation::InitialiseEvaporation() |
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74 | { |
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75 | nist = G4NistManager::Instance(); |
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76 | minExcitation = CLHEP::keV; |
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77 | if(theChannelFactory) { theChannels = theChannelFactory->GetChannel(); } |
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78 | nChannels = theChannels->size(); |
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79 | probabilities.resize(nChannels, 0.0); |
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80 | Initialise(); |
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81 | } |
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82 | |
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83 | void G4Evaporation::Initialise() |
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84 | { |
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85 | // loop over evaporation channels |
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86 | std::vector<G4VEvaporationChannel*>::iterator i; |
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87 | for (i=theChannels->begin(); i != theChannels->end(); ++i) |
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88 | { |
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89 | // for inverse cross section choice |
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90 | (*i)->SetOPTxs(OPTxs); |
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91 | // for superimposed Coulomb Barrier for inverse cross sections |
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92 | (*i)->UseSICB(useSICB); |
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93 | } |
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94 | } |
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95 | |
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96 | void G4Evaporation::SetDefaultChannel() |
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97 | { |
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98 | if (theChannelFactory != 0) delete theChannelFactory; |
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99 | theChannelFactory = new G4EvaporationFactory(); |
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100 | InitialiseEvaporation(); |
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101 | } |
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102 | |
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103 | void G4Evaporation::SetGEMChannel() |
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104 | { |
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105 | if (theChannelFactory != 0) delete theChannelFactory; |
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106 | theChannelFactory = new G4EvaporationGEMFactory(); |
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107 | InitialiseEvaporation(); |
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108 | } |
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109 | |
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110 | void G4Evaporation::SetCombinedChannel() |
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111 | { |
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112 | if (theChannelFactory != 0) delete theChannelFactory; |
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113 | theChannelFactory = new G4EvaporationDefaultGEMFactory(); |
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114 | InitialiseEvaporation(); |
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115 | } |
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116 | |
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117 | G4FragmentVector * G4Evaporation::BreakItUp(const G4Fragment &theNucleus) |
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118 | { |
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119 | G4FragmentVector * theResult = new G4FragmentVector; |
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120 | G4FragmentVector * theTempResult; |
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121 | |
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122 | // The residual nucleus (after evaporation of each fragment) |
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123 | G4Fragment* theResidualNucleus = new G4Fragment(theNucleus); |
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124 | |
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125 | G4double totprob, prob, oldprob = 0.0; |
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126 | G4int maxchannel, i; |
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127 | |
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128 | G4int Amax = theResidualNucleus->GetA_asInt(); |
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129 | |
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130 | // Starts loop over evaporated particles, loop is limited by number |
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131 | // of nucleons |
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132 | for(G4int ia=0; ia<Amax; ++ia) { |
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133 | |
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134 | // g,n,p - evaporation is finished |
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135 | G4int A = theResidualNucleus->GetA_asInt(); |
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136 | if(1 >= A) { |
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137 | theResult->push_back(theResidualNucleus); |
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138 | return theResult; |
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139 | } |
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140 | |
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141 | // check if it is stable, then finish evaporation |
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142 | G4int Z = theResidualNucleus->GetZ_asInt(); |
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143 | G4double abun = nist->GetIsotopeAbundance(Z, A); |
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144 | |
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145 | // G4cout << "### G4Evaporation::BreakItUp step " << ia << " Z= " << Z |
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146 | // << " A= " << A << " Eex(MeV)= " |
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147 | // << theResidualNucleus->GetExcitationEnergy() |
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148 | // << " aban= " << abun << G4endl; |
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149 | |
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150 | if(theResidualNucleus->GetExcitationEnergy() <= minExcitation && |
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151 | (abun > 0.0)) |
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152 | { |
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153 | theResult->push_back(theResidualNucleus); |
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154 | return theResult; |
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155 | } |
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156 | |
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157 | totprob = 0.0; |
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158 | maxchannel = nChannels; |
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159 | |
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160 | //G4cout << "### Evaporation loop #" << ia |
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161 | // << " Fragment: " << theResidualNucleus << G4endl; |
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162 | |
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163 | // loop over evaporation channels |
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164 | for(i=0; i<nChannels; ++i) { |
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165 | (*theChannels)[i]->Initialize(*theResidualNucleus); |
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166 | prob = (*theChannels)[i]->GetEmissionProbability(); |
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167 | //G4cout << " Channel# " << i << " prob= " << prob << G4endl; |
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168 | |
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169 | //if(0 == i && 0.0 == abun) { prob = 0.0; } |
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170 | |
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171 | totprob += prob; |
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172 | probabilities[i] = totprob; |
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173 | // if two recent probabilities are near zero stop computations |
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174 | if(i>=8) { |
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175 | if(prob <= totprob*1.e-8 && oldprob <= totprob*1.e-8) { |
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176 | maxchannel = i+1; |
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177 | break; |
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178 | } |
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179 | } |
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180 | oldprob = prob; |
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181 | } |
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182 | |
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183 | // photon evaporation in the case of no other channels available |
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184 | // do evaporation chain and reset total probability |
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185 | if(0.0 < totprob && probabilities[0] == totprob) { |
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186 | //G4cout << "Start gamma evaporation" << G4endl; |
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187 | theTempResult = (*theChannels)[0]->BreakUpFragment(theResidualNucleus); |
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188 | if(theTempResult) { |
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189 | size_t nsec = theTempResult->size(); |
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190 | for(size_t j=0; j<nsec; ++j) { |
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191 | theResult->push_back((*theTempResult)[j]); |
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192 | } |
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193 | delete theTempResult; |
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194 | } |
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195 | totprob = 0.0; |
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196 | } |
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197 | |
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198 | // stable fragnent - evaporation is finished |
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199 | if(0.0 == totprob) { |
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200 | |
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201 | // if fragment is exotic, then try to decay it |
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202 | if(0.0 == abun && Z < 20) { |
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203 | //G4cout << "$$$ Decay exotic fragment" << G4endl; |
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204 | theTempResult = unstableBreakUp.BreakUpFragment(theResidualNucleus); |
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205 | if(theTempResult) { |
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206 | size_t nsec = theTempResult->size(); |
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207 | for(size_t j=0; j<nsec; ++j) { |
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208 | theResult->push_back((*theTempResult)[j]); |
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209 | } |
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210 | delete theTempResult; |
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211 | } |
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212 | } |
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213 | |
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214 | // save residual fragment |
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215 | theResult->push_back(theResidualNucleus); |
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216 | return theResult; |
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217 | } |
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218 | |
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219 | |
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220 | // select channel |
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221 | totprob *= G4UniformRand(); |
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222 | // loop over evaporation channels |
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223 | for(i=0; i<maxchannel; ++i) { if(probabilities[i] >= totprob) { break; } } |
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224 | |
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225 | // this should not happen |
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226 | if(i >= nChannels) { i = nChannels - 1; } |
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227 | |
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228 | |
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229 | // single photon evaporation, primary pointer is kept |
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230 | if(0 == i) { |
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231 | //G4cout << "Single gamma" << G4endl; |
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232 | G4Fragment* gamma = (*theChannels)[0]->EmittedFragment(theResidualNucleus); |
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233 | if(gamma) { theResult->push_back(gamma); } |
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234 | |
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235 | // fission, return results to the main loop if fission is succesful |
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236 | } else if(1 == i) { |
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237 | //G4cout << "Fission" << G4endl; |
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238 | theTempResult = (*theChannels)[1]->BreakUp(*theResidualNucleus); |
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239 | if(theTempResult) { |
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240 | size_t nsec = theTempResult->size(); |
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241 | G4bool deletePrimary = true; |
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242 | for(size_t j=0; j<nsec; ++j) { |
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243 | if(theResidualNucleus == (*theTempResult)[j]) { deletePrimary = false; } |
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244 | theResult->push_back((*theTempResult)[j]); |
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245 | } |
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246 | if(deletePrimary) { delete theResidualNucleus; } |
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247 | delete theTempResult; |
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248 | return theResult; |
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249 | } |
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250 | |
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251 | // other channels |
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252 | } else { |
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253 | //G4cout << "Channel # " << i << G4endl; |
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254 | theTempResult = (*theChannels)[i]->BreakUp(*theResidualNucleus); |
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255 | if(theTempResult) { |
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256 | size_t nsec = theTempResult->size(); |
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257 | if(nsec > 0) { |
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258 | --nsec; |
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259 | for(size_t j=0; j<nsec; ++j) { |
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260 | theResult->push_back((*theTempResult)[j]); |
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261 | } |
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262 | // if the residual change its pointer |
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263 | // then delete previous residual fragment and update to the new |
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264 | if(theResidualNucleus != (*theTempResult)[nsec] ) { |
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265 | delete theResidualNucleus; |
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266 | theResidualNucleus = (*theTempResult)[nsec]; |
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267 | } |
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268 | } |
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269 | delete theTempResult; |
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270 | } |
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271 | } |
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272 | } |
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273 | |
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274 | // loop is stopped, save residual |
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275 | theResult->push_back(theResidualNucleus); |
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276 | |
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277 | #ifdef debug |
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278 | G4cout << "======== Evaporation Conservation Test ===========\n" |
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279 | << "==================================================\n"; |
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280 | CheckConservation(theNucleus,theResult); |
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281 | G4cout << "==================================================\n"; |
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282 | #endif |
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283 | return theResult; |
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284 | } |
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285 | |
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286 | /* |
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287 | G4FragmentVector * G4Evaporation::BreakItUp(const G4Fragment &theNucleus) |
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288 | { |
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289 | G4FragmentVector * theResult = new G4FragmentVector; |
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290 | |
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291 | // CHECK that Excitation Energy != 0 |
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292 | if (theNucleus.GetExcitationEnergy() <= 0.0) { |
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293 | theResult->push_back(new G4Fragment(theNucleus)); |
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294 | return theResult; |
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295 | } |
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296 | |
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297 | // The residual nucleus (after evaporation of each fragment) |
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298 | G4Fragment theResidualNucleus = theNucleus; |
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299 | |
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300 | // Number of channels |
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301 | G4int TotNumberOfChannels = theChannels->size(); |
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302 | |
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303 | // Starts loop over evaporated particles |
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304 | for (;;) |
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305 | |
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306 | { |
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307 | // loop over evaporation channels |
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308 | std::vector<G4VEvaporationChannel*>::iterator i; |
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309 | for (i=theChannels->begin(); i != theChannels->end(); i++) |
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310 | { |
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311 | // for inverse cross section choice |
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312 | (*i)->SetOPTxs(OPTxs); |
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313 | // for superimposed Coulomb Barrier for inverse cross sections |
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314 | (*i)->UseSICB(useSICB); |
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315 | |
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316 | (*i)->Initialize(theResidualNucleus); |
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317 | } |
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318 | // Can't use this form beacuse Initialize is a non const member function |
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319 | // for_each(theChannels->begin(),theChannels->end(), |
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320 | // bind2nd(mem_fun(&G4VEvaporationChannel::Initialize),theResidualNucleus)); |
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321 | // Work out total decay probability by summing over channels |
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322 | G4double TotalProbability = std::accumulate(theChannels->begin(), |
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323 | theChannels->end(), |
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324 | 0.0,SumProbabilities()); |
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325 | |
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326 | if (TotalProbability <= 0.0) |
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327 | { |
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328 | // Will be no evaporation more |
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329 | // write information about residual nucleus |
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330 | theResult->push_back(new G4Fragment(theResidualNucleus)); |
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331 | break; |
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332 | } |
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333 | else |
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334 | { |
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335 | // Selection of evaporation channel, fission or gamma |
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336 | // G4double * EmissionProbChannel = new G4double(TotNumberOfChannels); |
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337 | std::vector<G4double> EmissionProbChannel; |
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338 | EmissionProbChannel.reserve(theChannels->size()); |
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339 | |
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340 | |
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341 | // EmissionProbChannel[0] = theChannels->at(0)->GetEmissionProbability(); |
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342 | |
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343 | |
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344 | G4double first = theChannels->front()->GetEmissionProbability(); |
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345 | |
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346 | EmissionProbChannel.push_back(first >0 ? first : 0); // index 0 |
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347 | |
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348 | |
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349 | // EmissionProbChannel.push_back(theChannels->front()->GetEmissionProbability()); // index 0 |
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350 | |
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351 | for (i= (theChannels->begin()+1); i != theChannels->end(); i++) |
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352 | { |
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353 | // EmissionProbChannel[i] = EmissionProbChannel[i-1] + |
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354 | // theChannels->at(i)->GetEmissionProbability(); |
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355 | // EmissionProbChannel.push_back(EmissionProbChannel.back() + (*i)->GetEmissionProbability()); |
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356 | first = (*i)->GetEmissionProbability(); |
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357 | EmissionProbChannel.push_back(first> 0? EmissionProbChannel.back() + first : EmissionProbChannel.back()); |
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358 | } |
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359 | |
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360 | G4double shoot = G4UniformRand() * TotalProbability; |
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361 | G4int j; |
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362 | for (j=0; j < TotNumberOfChannels; j++) |
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363 | { |
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364 | // if (shoot < EmissionProbChannel[i]) |
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365 | if (shoot < EmissionProbChannel[j]) |
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366 | break; |
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367 | } |
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368 | |
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369 | // delete [] EmissionProbChannel; |
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370 | EmissionProbChannel.clear(); |
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371 | |
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372 | if( j >= TotNumberOfChannels ) |
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373 | { |
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374 | G4cerr << " Residual A: " << theResidualNucleus.GetA() << " Residual Z: " << theResidualNucleus.GetZ() << " Excitation Energy: " << theResidualNucleus.GetExcitationEnergy() << G4endl; |
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375 | G4cerr << " j has not chosen a channel, j = " << j << " TotNumberOfChannels " << TotNumberOfChannels << " Total Probability: " << TotalProbability << G4endl; |
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376 | for (j=0; j < TotNumberOfChannels; j++) |
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377 | { |
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378 | G4cerr << " j: " << j << " EmissionProbChannel: " << EmissionProbChannel[j] << " and shoot: " << shoot << " (<ProbChannel?) " << G4endl; |
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379 | } |
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380 | throw G4HadronicException(__FILE__, __LINE__, "G4Evaporation::BreakItUp: Can't define emission probability of the channels!" ); |
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381 | } |
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382 | else |
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383 | { |
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384 | // Perform break-up |
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385 | G4FragmentVector * theEvaporationResult = (*theChannels)[j]->BreakUp(theResidualNucleus); |
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386 | |
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387 | #ifdef debug |
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388 | G4cout << "-----------------------------------------------------------\n"; |
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389 | G4cout << G4endl << " After the evaporation of a particle, testing conservation \n"; |
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390 | CheckConservation(theResidualNucleus,theEvaporationResult); |
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391 | G4cout << G4endl |
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392 | << "------------------------------------------------------------\n"; |
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393 | #endif |
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394 | |
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395 | // Check if chosen channel is fission (there are only two EXCITED fragments) |
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396 | // or the channel could not evaporate anything |
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397 | if ( theEvaporationResult->size() == 1 || |
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398 | ((*(theEvaporationResult->begin()))->GetExcitationEnergy() > 0.0 && |
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399 | (*(theEvaporationResult->end()-1))->GetExcitationEnergy() > 0.0) ) { |
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400 | // FISSION |
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401 | for (G4FragmentVector::iterator i = theEvaporationResult->begin(); |
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402 | i != theEvaporationResult->end(); ++i) |
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403 | { |
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404 | theResult->push_back(*(i)); |
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405 | } |
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406 | delete theEvaporationResult; |
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407 | break; |
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408 | } else { |
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409 | // EVAPORATION |
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410 | for (G4FragmentVector::iterator i = theEvaporationResult->begin(); |
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411 | i != theEvaporationResult->end()-1; ++i) |
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412 | { |
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413 | #ifdef PRECOMPOUND_TEST |
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414 | if ((*i)->GetA() == 0) (*i)->SetCreatorModel(G4String("G4PhotonEvaporation")); |
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415 | #endif |
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416 | theResult->push_back(*(i)); |
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417 | } |
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418 | theResidualNucleus = *(theEvaporationResult->back()); |
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419 | delete theEvaporationResult->back(); |
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420 | delete theEvaporationResult; |
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421 | #ifdef PRECOMPOUND_TEST |
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422 | theResidualNucleus.SetCreatorModel(G4String("ResidualNucleus")); |
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423 | #endif |
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424 | |
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425 | } |
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426 | } |
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427 | } |
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428 | } |
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429 | |
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430 | #ifdef debug |
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431 | G4cout << "======== Evaporation Conservation Test ===========\n" |
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432 | << "==================================================\n"; |
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433 | CheckConservation(theNucleus,theResult); |
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434 | G4cout << "==================================================\n"; |
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435 | #endif |
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436 | return theResult; |
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437 | } |
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438 | */ |
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439 | |
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440 | |
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441 | #ifdef debug |
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442 | void G4Evaporation::CheckConservation(const G4Fragment & theInitialState, |
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443 | G4FragmentVector * Result) const |
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444 | { |
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445 | G4double ProductsEnergy =0; |
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446 | G4ThreeVector ProductsMomentum; |
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447 | G4int ProductsA = 0; |
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448 | G4int ProductsZ = 0; |
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449 | for (G4FragmentVector::iterator h = Result->begin(); h != Result->end(); h++) { |
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450 | G4LorentzVector tmp = (*h)->GetMomentum(); |
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451 | ProductsEnergy += tmp.e(); |
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452 | ProductsMomentum += tmp.vect(); |
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453 | ProductsA += static_cast<G4int>((*h)->GetA()); |
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454 | ProductsZ += static_cast<G4int>((*h)->GetZ()); |
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455 | } |
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456 | |
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457 | if (ProductsA != theInitialState.GetA()) { |
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458 | G4cout << "!!!!!!!!!! Baryonic Number Conservation Violation !!!!!!!!!!" << G4endl; |
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459 | G4cout << "G4Evaporation.cc: Barionic Number Conservation test for evaporation fragments" |
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460 | << G4endl; |
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461 | G4cout << "Initial A = " << theInitialState.GetA() |
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462 | << " Fragments A = " << ProductsA << " Diference --> " |
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463 | << theInitialState.GetA() - ProductsA << G4endl; |
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464 | } |
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465 | if (ProductsZ != theInitialState.GetZ()) { |
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466 | G4cout << "!!!!!!!!!! Charge Conservation Violation !!!!!!!!!!" << G4endl; |
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467 | G4cout << "G4Evaporation.cc: Charge Conservation test for evaporation fragments" |
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468 | << G4endl; |
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469 | G4cout << "Initial Z = " << theInitialState.GetZ() |
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470 | << " Fragments Z = " << ProductsZ << " Diference --> " |
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471 | << theInitialState.GetZ() - ProductsZ << G4endl; |
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472 | } |
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473 | if (std::abs(ProductsEnergy-theInitialState.GetMomentum().e()) > 1.0*keV) { |
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474 | G4cout << "!!!!!!!!!! Energy Conservation Violation !!!!!!!!!!" << G4endl; |
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475 | G4cout << "G4Evaporation.cc: Energy Conservation test for evaporation fragments" |
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476 | << G4endl; |
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477 | G4cout << "Initial E = " << theInitialState.GetMomentum().e()/MeV << " MeV" |
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478 | << " Fragments E = " << ProductsEnergy/MeV << " MeV Diference --> " |
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479 | << (theInitialState.GetMomentum().e() - ProductsEnergy)/MeV << " MeV" << G4endl; |
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480 | } |
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481 | if (std::abs(ProductsMomentum.x()-theInitialState.GetMomentum().x()) > 1.0*keV || |
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482 | std::abs(ProductsMomentum.y()-theInitialState.GetMomentum().y()) > 1.0*keV || |
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483 | std::abs(ProductsMomentum.z()-theInitialState.GetMomentum().z()) > 1.0*keV) { |
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484 | G4cout << "!!!!!!!!!! Momentum Conservation Violation !!!!!!!!!!" << G4endl; |
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485 | G4cout << "G4Evaporation.cc: Momentum Conservation test for evaporation fragments" |
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486 | << G4endl; |
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487 | G4cout << "Initial P = " << theInitialState.GetMomentum().vect() << " MeV" |
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488 | << " Fragments P = " << ProductsMomentum << " MeV Diference --> " |
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489 | << theInitialState.GetMomentum().vect() - ProductsMomentum << " MeV" << G4endl; |
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490 | } |
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491 | return; |
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492 | } |
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493 | #endif |
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494 | |
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495 | |
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496 | |
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497 | |
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