1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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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: G4StatMFMicroManager.cc,v 1.6 2008/07/25 11:20:47 vnivanch Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03 $ |
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29 | // |
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30 | // Hadronic Process: Nuclear De-excitations |
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31 | // by V. Lara |
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32 | |
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33 | |
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34 | #include "G4StatMFMicroManager.hh" |
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35 | #include "G4HadronicException.hh" |
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36 | |
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37 | |
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38 | // Copy constructor |
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39 | G4StatMFMicroManager::G4StatMFMicroManager(const G4StatMFMicroManager & ) |
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40 | { |
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41 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMicroManager::copy_constructor meant to not be accessable"); |
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42 | } |
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43 | |
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44 | // Operators |
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45 | |
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46 | G4StatMFMicroManager & G4StatMFMicroManager:: |
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47 | operator=(const G4StatMFMicroManager & ) |
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48 | { |
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49 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMicroManager::operator= meant to not be accessable"); |
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50 | return *this; |
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51 | } |
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52 | |
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53 | |
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54 | G4bool G4StatMFMicroManager::operator==(const G4StatMFMicroManager & ) const |
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55 | { |
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56 | return false; |
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57 | } |
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58 | |
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59 | |
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60 | G4bool G4StatMFMicroManager::operator!=(const G4StatMFMicroManager & ) const |
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61 | { |
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62 | return true; |
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63 | } |
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64 | |
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65 | |
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66 | |
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67 | // constructor |
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68 | G4StatMFMicroManager::G4StatMFMicroManager(const G4Fragment & theFragment, const G4int multiplicity, |
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69 | const G4double FreeIntE, const G4double SCompNuc) : |
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70 | _Normalization(0.0) |
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71 | { |
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72 | // Perform class initialization |
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73 | Initialize(theFragment,multiplicity,FreeIntE,SCompNuc); |
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74 | } |
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75 | |
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76 | |
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77 | // destructor |
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78 | G4StatMFMicroManager::~G4StatMFMicroManager() |
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79 | { |
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80 | if (!_Partition.empty()) |
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81 | { |
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82 | std::for_each(_Partition.begin(),_Partition.end(), |
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83 | DeleteFragment()); |
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84 | } |
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85 | } |
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86 | |
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87 | |
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88 | |
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89 | // Initialization method |
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90 | |
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91 | void G4StatMFMicroManager::Initialize(const G4Fragment & theFragment, const G4int m, |
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92 | const G4double FreeIntE, const G4double SCompNuc) |
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93 | { |
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94 | G4int i; |
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95 | |
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96 | G4double U = theFragment.GetExcitationEnergy(); |
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97 | |
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98 | G4double A = theFragment.GetA(); |
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99 | G4double Z = theFragment.GetZ(); |
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100 | |
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101 | // Statistical weights |
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102 | _WW = 0.0; |
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103 | |
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104 | // Mean breakup multiplicity |
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105 | _MeanMultiplicity = 0.0; |
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106 | |
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107 | // Mean channel temperature |
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108 | _MeanTemperature = 0.0; |
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109 | |
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110 | // Mean channel entropy |
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111 | _MeanEntropy = 0.0; |
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112 | |
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113 | // Keep fragment atomic numbers |
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114 | // G4int * FragmentAtomicNumbers = new G4int(static_cast<G4int>(A+0.5)); |
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115 | // G4int * FragmentAtomicNumbers = new G4int(m); |
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116 | G4int FragmentAtomicNumbers[4]; |
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117 | |
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118 | // We distribute A nucleons between m fragments mantaining the order |
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119 | // FragmentAtomicNumbers[m-1]>FragmentAtomicNumbers[m-2]>...>FragmentAtomicNumbers[0] |
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120 | // Our initial distribution is |
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121 | // FragmentAtomicNumbers[m-1]=A, FragmentAtomicNumbers[m-2]=0, ..., FragmentAtomicNumbers[0]=0 |
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122 | FragmentAtomicNumbers[m-1] = static_cast<G4int>(A); |
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123 | for (i = 0; i < (m - 1); i++) FragmentAtomicNumbers[i] = 0; |
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124 | |
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125 | // We try to distribute A nucleons in partitions of m fragments |
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126 | // MakePartition return true if it is possible |
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127 | // and false if it is not |
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128 | while (MakePartition(m,FragmentAtomicNumbers)) { |
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129 | // Allowed partitions are stored and its probability calculated |
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130 | |
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131 | G4StatMFMicroPartition * aPartition = new G4StatMFMicroPartition(static_cast<G4int>(A), |
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132 | static_cast<G4int>(Z)); |
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133 | G4double PartitionProbability = 0.0; |
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134 | |
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135 | for (i = m-1; i >= 0; i--) aPartition->SetPartitionFragment(FragmentAtomicNumbers[i]); |
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136 | PartitionProbability = aPartition->CalcPartitionProbability(U,FreeIntE,SCompNuc); |
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137 | _Partition.push_back(aPartition); |
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138 | |
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139 | _WW += PartitionProbability; |
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140 | _MeanMultiplicity += m*PartitionProbability; |
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141 | _MeanTemperature += aPartition->GetTemperature() * PartitionProbability; |
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142 | if (PartitionProbability > 0.0) |
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143 | _MeanEntropy += PartitionProbability * aPartition->GetEntropy(); |
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144 | |
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145 | } |
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146 | |
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147 | |
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148 | // garbage collection |
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149 | // delete [] FragmentAtomicNumbers; |
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150 | |
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151 | } |
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152 | |
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153 | |
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154 | G4bool G4StatMFMicroManager::MakePartition(const G4int k, G4int * ANumbers) |
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155 | // Distributes A nucleons between k fragments |
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156 | // mantaining the order ANumbers[k-1] > ANumbers[k-2] > ... > ANumbers[0] |
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157 | // If it is possible returns true. In other case returns false |
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158 | { |
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159 | G4int l = 1; |
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160 | while (l < k) { |
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161 | G4int tmp = ANumbers[l-1] + ANumbers[k-1]; |
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162 | ANumbers[l-1] += 1; |
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163 | ANumbers[k-1] -= 1; |
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164 | if (ANumbers[l-1] > ANumbers[l] || ANumbers[k-2] > ANumbers[k-1]) { |
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165 | ANumbers[l-1] = 1; |
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166 | ANumbers[k-1] = tmp - 1; |
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167 | l++; |
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168 | } else return true; |
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169 | } |
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170 | return false; |
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171 | } |
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172 | |
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173 | |
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174 | |
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175 | void G4StatMFMicroManager::Normalize(const G4double Norm) |
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176 | { |
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177 | _Normalization = Norm; |
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178 | _WW /= Norm; |
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179 | _MeanMultiplicity /= Norm; |
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180 | _MeanTemperature /= Norm; |
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181 | _MeanEntropy /= Norm; |
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182 | |
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183 | return; |
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184 | } |
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185 | |
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186 | G4StatMFChannel * G4StatMFMicroManager::ChooseChannel(const G4double A0, const G4double Z0, |
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187 | const G4double MeanT) |
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188 | { |
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189 | G4double RandNumber = _Normalization * _WW * G4UniformRand(); |
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190 | G4double AccumWeight = 0.0; |
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191 | |
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192 | for (std::vector<G4StatMFMicroPartition*>::iterator i = _Partition.begin(); |
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193 | i != _Partition.end(); ++i) |
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194 | { |
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195 | AccumWeight += (*i)->GetProbability(); |
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196 | if (RandNumber < AccumWeight) |
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197 | return (*i)->ChooseZ(A0,Z0,MeanT); |
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198 | } |
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199 | |
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200 | throw G4HadronicException(__FILE__, __LINE__, |
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201 | "G4StatMFMicroCanonical::ChooseChannel: Couldn't find a channel."); |
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202 | return 0; |
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203 | } |
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