1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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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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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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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: G4StatMFMacroCanonical.cc,v 1.8 2008/11/19 14:33:31 vnivanch Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-02 $ |
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29 | // |
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30 | // by V. Lara |
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31 | // -------------------------------------------------------------------- |
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32 | // |
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33 | // Modified: |
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34 | // 25.07.08 I.Pshenichnov (in collaboration with Alexander Botvina and Igor |
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35 | // Mishustin (FIAS, Frankfurt, INR, Moscow and Kurchatov Institute, |
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36 | // Moscow, pshenich@fias.uni-frankfurt.de) fixed infinite loop for |
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37 | // a fagment with Z=A; fixed memory leak |
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38 | |
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39 | #include "G4StatMFMacroCanonical.hh" |
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40 | |
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41 | |
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42 | // constructor |
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43 | G4StatMFMacroCanonical::G4StatMFMacroCanonical(const G4Fragment & theFragment) |
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44 | { |
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45 | |
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46 | // Get memory for clusters |
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47 | _theClusters.push_back(new G4StatMFMacroNucleon); // Size 1 |
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48 | _theClusters.push_back(new G4StatMFMacroBiNucleon); // Size 2 |
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49 | _theClusters.push_back(new G4StatMFMacroTriNucleon); // Size 3 |
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50 | _theClusters.push_back(new G4StatMFMacroTetraNucleon); // Size 4 |
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51 | for (G4int i = 4; i < theFragment.GetA(); i++) |
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52 | _theClusters.push_back(new G4StatMFMacroMultiNucleon(i+1)); // Size 5 ... A |
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53 | |
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54 | // Perform class initialization |
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55 | Initialize(theFragment); |
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56 | |
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57 | } |
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58 | |
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59 | |
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60 | // destructor |
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61 | G4StatMFMacroCanonical::~G4StatMFMacroCanonical() |
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62 | { |
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63 | // garbage collection |
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64 | if (!_theClusters.empty()) |
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65 | { |
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66 | std::for_each(_theClusters.begin(),_theClusters.end(),DeleteFragment()); |
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67 | } |
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68 | } |
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69 | |
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70 | // operators definitions |
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71 | G4StatMFMacroCanonical & |
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72 | G4StatMFMacroCanonical::operator=(const G4StatMFMacroCanonical & ) |
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73 | { |
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74 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroCanonical::operator= meant to not be accessable"); |
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75 | return *this; |
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76 | } |
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77 | |
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78 | G4bool G4StatMFMacroCanonical::operator==(const G4StatMFMacroCanonical & ) const |
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79 | { |
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80 | return false; |
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81 | } |
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82 | |
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83 | |
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84 | G4bool G4StatMFMacroCanonical::operator!=(const G4StatMFMacroCanonical & ) const |
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85 | { |
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86 | return true; |
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87 | } |
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88 | |
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89 | |
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90 | // Initialization method |
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91 | |
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92 | |
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93 | void G4StatMFMacroCanonical::Initialize(const G4Fragment & theFragment) |
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94 | { |
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95 | |
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96 | G4double A = theFragment.GetA(); |
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97 | G4double Z = theFragment.GetZ(); |
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98 | |
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99 | // Free Internal energy at T = 0 |
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100 | __FreeInternalE0 = A*( -G4StatMFParameters::GetE0() + // Volume term (for T = 0) |
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101 | G4StatMFParameters::GetGamma0()* // Symmetry term |
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102 | (1.0-2.0*Z/A)*(1.0-2.0*Z/A) ) + |
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103 | G4StatMFParameters::GetBeta0()*std::pow(A,2.0/3.0) + // Surface term (for T = 0) |
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104 | (3.0/5.0)*elm_coupling*Z*Z/(G4StatMFParameters::Getr0()* // Coulomb term |
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105 | std::pow(A,1.0/3.0)); |
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106 | |
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107 | |
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108 | |
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109 | CalculateTemperature(theFragment); |
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110 | |
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111 | return; |
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112 | } |
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113 | |
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114 | |
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115 | |
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116 | |
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117 | |
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118 | void G4StatMFMacroCanonical::CalculateTemperature(const G4Fragment & theFragment) |
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119 | { |
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120 | // Excitation Energy |
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121 | G4double U = theFragment.GetExcitationEnergy(); |
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122 | |
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123 | G4double A = theFragment.GetA(); |
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124 | G4double Z = theFragment.GetZ(); |
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125 | |
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126 | // Fragment Multiplicity |
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127 | G4double FragMult = std::max((1.0+(2.31/MeV)*(U/A - 3.5*MeV))*A/100.0, 2.0); |
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128 | |
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129 | |
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130 | // Parameter Kappa |
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131 | _Kappa = (1.0+elm_coupling*(std::pow(FragMult,1./3.)-1)/ |
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132 | (G4StatMFParameters::Getr0()*std::pow(A,1./3.))); |
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133 | _Kappa = _Kappa*_Kappa*_Kappa - 1.0; |
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134 | |
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135 | |
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136 | G4StatMFMacroTemperature * theTemp = new |
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137 | G4StatMFMacroTemperature(A,Z,U,__FreeInternalE0,_Kappa,&_theClusters); |
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138 | |
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139 | __MeanTemperature = theTemp->CalcTemperature(); |
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140 | _ChemPotentialNu = theTemp->GetChemicalPotentialNu(); |
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141 | _ChemPotentialMu = theTemp->GetChemicalPotentialMu(); |
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142 | __MeanMultiplicity = theTemp->GetMeanMultiplicity(); |
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143 | __MeanEntropy = theTemp->GetEntropy(); |
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144 | |
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145 | delete theTemp; |
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146 | |
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147 | return; |
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148 | } |
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149 | |
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150 | |
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151 | // -------------------------------------------------------------------------- |
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152 | |
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153 | G4StatMFChannel * G4StatMFMacroCanonical::ChooseAandZ(const G4Fragment &theFragment) |
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154 | // Calculate total fragments multiplicity, fragment atomic numbers and charges |
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155 | { |
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156 | G4double A = theFragment.GetA(); |
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157 | G4double Z = theFragment.GetZ(); |
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158 | |
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159 | std::vector<G4double> ANumbers(static_cast<G4int>(A)); |
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160 | |
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161 | G4double Multiplicity = ChooseA(A,ANumbers); |
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162 | |
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163 | |
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164 | std::vector<G4double> FragmentsA; |
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165 | |
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166 | G4int i = 0; |
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167 | for (i = 0; i < A; i++) |
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168 | { |
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169 | for (G4int j = 0; j < ANumbers[i]; j++) FragmentsA.push_back(i+1); |
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170 | } |
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171 | |
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172 | |
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173 | // Sort fragments in decreasing order |
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174 | G4int im = 0; |
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175 | for (G4int j = 0; j < Multiplicity; j++) |
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176 | { |
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177 | G4double FragmentsAMax = 0.0; |
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178 | im = j; |
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179 | for (i = j; i < Multiplicity; i++) |
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180 | { |
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181 | if (FragmentsA[i] <= FragmentsAMax) continue; |
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182 | else |
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183 | { |
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184 | im = i; |
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185 | FragmentsAMax = FragmentsA[im]; |
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186 | } |
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187 | } |
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188 | |
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189 | if (im != j) |
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190 | { |
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191 | FragmentsA[im] = FragmentsA[j]; |
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192 | FragmentsA[j] = FragmentsAMax; |
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193 | } |
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194 | } |
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195 | |
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196 | return ChooseZ(static_cast<G4int>(Z),FragmentsA); |
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197 | } |
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198 | |
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199 | |
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200 | |
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201 | G4double G4StatMFMacroCanonical::ChooseA(const G4double A, std::vector<G4double> & ANumbers) |
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202 | // Determines fragments multiplicities and compute total fragment multiplicity |
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203 | { |
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204 | G4double multiplicity = 0.0; |
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205 | G4int i; |
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206 | |
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207 | |
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208 | std::vector<G4double> AcumMultiplicity; |
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209 | AcumMultiplicity.reserve(static_cast<G4int>(A)); |
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210 | |
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211 | AcumMultiplicity.push_back((*(_theClusters.begin()))->GetMeanMultiplicity()); |
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212 | for (std::vector<G4VStatMFMacroCluster*>::iterator it = _theClusters.begin()+1; |
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213 | it != _theClusters.end(); ++it) |
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214 | { |
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215 | AcumMultiplicity.push_back((*it)->GetMeanMultiplicity()+AcumMultiplicity.back()); |
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216 | } |
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217 | |
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218 | G4int CheckA; |
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219 | do { |
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220 | CheckA = -1; |
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221 | G4int SumA = 0; |
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222 | G4int ThisOne = 0; |
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223 | multiplicity = 0.0; |
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224 | for (i = 0; i < A; i++) ANumbers[i] = 0.0; |
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225 | do { |
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226 | G4double RandNumber = G4UniformRand()*__MeanMultiplicity; |
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227 | for (i = 0; i < A; i++) { |
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228 | if (RandNumber < AcumMultiplicity[i]) { |
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229 | ThisOne = i; |
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230 | break; |
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231 | } |
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232 | } |
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233 | multiplicity++; |
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234 | ANumbers[ThisOne] = ANumbers[ThisOne]+1; |
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235 | SumA += ThisOne+1; |
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236 | CheckA = static_cast<G4int>(A) - SumA; |
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237 | |
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238 | } while (CheckA > 0); |
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239 | |
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240 | } while (CheckA < 0 || std::abs(__MeanMultiplicity - multiplicity) > std::sqrt(__MeanMultiplicity) + 1./2.); |
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241 | |
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242 | return multiplicity; |
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243 | } |
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244 | |
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245 | |
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246 | G4StatMFChannel * G4StatMFMacroCanonical::ChooseZ(const G4int & Z, |
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247 | std::vector<G4double> & FragmentsA) |
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248 | // |
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249 | { |
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250 | std::vector<G4double> FragmentsZ; |
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251 | |
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252 | G4double DeltaZ = 0.0; |
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253 | G4double CP = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())* |
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254 | (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.)); |
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255 | |
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256 | G4int multiplicity = FragmentsA.size(); |
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257 | |
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258 | do |
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259 | { |
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260 | FragmentsZ.clear(); |
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261 | G4int SumZ = 0; |
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262 | for (G4int i = 0; i < multiplicity; i++) |
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263 | { |
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264 | G4double A = FragmentsA[i]; |
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265 | if (A <= 1.0) |
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266 | { |
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267 | G4double RandNumber = G4UniformRand(); |
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268 | if (RandNumber < (*_theClusters.begin())->GetZARatio()) |
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269 | { |
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270 | FragmentsZ.push_back(1.0); |
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271 | SumZ += static_cast<G4int>(FragmentsZ[i]); |
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272 | } |
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273 | else FragmentsZ.push_back(0.0); |
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274 | } |
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275 | else |
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276 | { |
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277 | G4double RandZ; |
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278 | G4double CC = 8.0*G4StatMFParameters::GetGamma0()+2.0*CP*std::pow(FragmentsA[i],2./3.); |
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279 | G4double ZMean; |
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280 | if (FragmentsA[i] > 1.5 && FragmentsA[i] < 4.5) ZMean = 0.5*FragmentsA[i]; |
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281 | else ZMean = FragmentsA[i]*(4.0*G4StatMFParameters::GetGamma0()+_ChemPotentialNu)/CC; |
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282 | G4double ZDispersion = std::sqrt(FragmentsA[i]*__MeanTemperature/CC); |
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283 | G4int z; |
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284 | do |
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285 | { |
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286 | RandZ = G4RandGauss::shoot(ZMean,ZDispersion); |
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287 | z = static_cast<G4int>(RandZ+0.5); |
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288 | } while (z < 0 || z > A); |
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289 | FragmentsZ.push_back(z); |
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290 | SumZ += z; |
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291 | } |
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292 | } |
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293 | DeltaZ = Z - SumZ; |
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294 | } |
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295 | while (std::abs(DeltaZ) > 1.1); |
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296 | |
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297 | // DeltaZ can be 0, 1 or -1 |
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298 | G4int idx = 0; |
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299 | if (DeltaZ < 0.0) |
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300 | { |
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301 | while (FragmentsZ[idx] < 0.5) ++idx; |
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302 | } |
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303 | FragmentsZ[idx] += DeltaZ; |
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304 | |
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305 | G4StatMFChannel * theChannel = new G4StatMFChannel; |
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306 | for (G4int i = multiplicity-1; i >= 0; i--) |
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307 | { |
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308 | theChannel->CreateFragment(FragmentsA[i],FragmentsZ[i]); |
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309 | } |
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310 | |
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311 | |
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312 | return theChannel; |
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313 | } |
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