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 | // Hadronic Process: Nuclear De-excitations |
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28 | // by V. Lara (Nov 1998) |
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29 | |
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30 | #include "G4FermiConfigurationList.hh" |
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31 | #include "G4FermiSplitter.hh" |
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32 | #include "G4HadronicException.hh" |
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33 | |
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34 | G4FermiFragmentsPool & G4FermiConfigurationList::GetFragmentsPoolInstance() |
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35 | { |
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36 | static G4FermiFragmentsPool theFragmentsPool; |
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37 | return theFragmentsPool; |
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38 | } |
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39 | |
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40 | G4FermiConfigurationList::G4FermiConfigurationList() |
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41 | { |
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42 | } |
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43 | |
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44 | G4FermiConfigurationList::G4FermiConfigurationList(const G4FermiConfigurationList &) |
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45 | { |
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46 | throw G4HadronicException(__FILE__, __LINE__, "G4FermiConfigurationList::copy_constructor meant to not be accessable"); |
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47 | } |
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48 | |
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49 | |
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50 | const G4FermiConfigurationList & G4FermiConfigurationList:: |
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51 | operator=(const G4FermiConfigurationList &) |
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52 | { |
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53 | throw G4HadronicException(__FILE__, __LINE__, "G4FermiConfigurationList::operator= meant to not be accessable"); |
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54 | return *this; |
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55 | } |
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56 | |
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57 | |
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58 | G4bool G4FermiConfigurationList::operator==(const G4FermiConfigurationList &) const |
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59 | { |
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60 | return false; |
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61 | } |
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62 | |
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63 | G4bool G4FermiConfigurationList::operator!=(const G4FermiConfigurationList &) const |
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64 | { |
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65 | return true; |
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66 | } |
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67 | |
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68 | |
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69 | |
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70 | G4bool G4FermiConfigurationList:: |
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71 | Initialize(const G4int A, const G4int Z, const G4double TotalEnergyRF) |
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72 | { |
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73 | // |
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74 | // let's split nucleus into k = 2,...,A fragments |
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75 | // |
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76 | Configurations.clear(); |
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77 | NormalizedWeights.clear(); |
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78 | G4FermiSplitter aSplitter(&GetFragmentsPoolInstance()); |
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79 | G4double NormStatWeight = 0.0; |
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80 | for (G4int k = 2; k <= A; k++) |
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81 | { |
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82 | // Initialize Configuration for k fragments |
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83 | aSplitter.Initialize(A,Z,k); |
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84 | for (G4int i = 0; i < aSplitter.GetNumberOfSplits(); i++) |
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85 | { |
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86 | // Create a configuration from a split |
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87 | G4FermiConfiguration * aConfiguration = new G4FermiConfiguration(aSplitter.GetSplit(i)); |
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88 | |
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89 | // Store configuration |
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90 | Configurations.push_back(aConfiguration); |
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91 | |
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92 | // Non-Normalized statistical weight for given channel with k fragments |
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93 | G4double StatWeight = aConfiguration->DecayProbability(A,TotalEnergyRF); |
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94 | NormStatWeight += StatWeight; |
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95 | // Statistical weights (it will be normalized...) |
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96 | NormalizedWeights.push_back(StatWeight); |
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97 | } |
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98 | } |
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99 | |
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100 | if (NormStatWeight > 0.0) |
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101 | { |
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102 | // Let's normalize statistical weights of channels |
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103 | std::transform(NormalizedWeights.begin(), NormalizedWeights.end(), |
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104 | NormalizedWeights.begin(), |
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105 | std::bind2nd(std::divides<G4double>(),NormStatWeight)); |
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106 | return true; |
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107 | } |
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108 | |
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109 | return false; |
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110 | } |
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111 | |
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112 | |
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113 | |
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114 | G4FermiConfiguration G4FermiConfigurationList::ChooseConfiguration(void) |
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115 | { |
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116 | G4double RandomWeight = G4UniformRand(); |
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117 | G4double AcumWeight = 0.0; |
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118 | std::vector<G4double>::iterator thisConfig; |
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119 | for (thisConfig = NormalizedWeights.begin(); thisConfig != NormalizedWeights.end(); ++thisConfig) |
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120 | { |
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121 | // We are adding the prob. of each configuration |
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122 | AcumWeight += *thisConfig; |
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123 | if (AcumWeight >= RandomWeight) break; |
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124 | } |
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125 | if (thisConfig == NormalizedWeights.end()) |
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126 | { |
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127 | throw G4HadronicException(__FILE__, __LINE__, "G4FermiConfigurationList::ChooseConfigration: Cannot choose a configuration"); |
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128 | G4FermiConfiguration dummy; |
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129 | return dummy; |
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130 | } |
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131 | else |
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132 | { |
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133 | #ifdef G4NO_ISO_VECDIST |
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134 | std::vector<G4double>::difference_type n = 0; |
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135 | std::distance(NormalizedWeights.begin(),thisConfig,n); |
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136 | return *(Configurations[n]); |
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137 | #else |
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138 | return *(Configurations[std::distance(NormalizedWeights.begin(),thisConfig)]); |
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139 | #endif |
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140 | } |
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141 | } |
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