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 | // File name: G4PiMinusStopAbsorption |
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27 | // |
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28 | // Author: Maria Grazia Pia (pia@genova.infn.it) |
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29 | // |
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30 | // Creation date: 8 May 1998 |
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31 | // |
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32 | // ------------------------------------------------------------------- |
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33 | |
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34 | |
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35 | #include "G4PiMinusStopAbsorption.hh" |
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36 | #include <vector> |
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37 | |
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38 | #include "globals.hh" |
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39 | #include "Randomize.hh" |
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40 | #include "G4NucleiProperties.hh" |
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41 | #include "G4ParticleTypes.hh" |
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42 | #include "G4Nucleus.hh" |
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43 | #include "G4ReactionKinematics.hh" |
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44 | #include "G4DynamicParticleVector.hh" |
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45 | #include "G4ParticleDefinition.hh" |
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46 | #include "G4Proton.hh" |
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47 | #include "G4Neutron.hh" |
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48 | #include "G4ThreeVector.hh" |
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49 | |
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50 | // Constructor |
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51 | |
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52 | G4PiMinusStopAbsorption::G4PiMinusStopAbsorption(G4PiMinusStopMaterial* materialAlgo, |
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53 | const G4double Z, const G4double A) |
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54 | |
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55 | { |
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56 | _materialAlgo = materialAlgo; |
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57 | _nucleusZ = Z; |
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58 | _nucleusA = A; |
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59 | _level = 0; |
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60 | _absorptionProducts = new G4DynamicParticleVector(); |
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61 | } |
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62 | |
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63 | // Destructor |
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64 | |
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65 | G4PiMinusStopAbsorption::~G4PiMinusStopAbsorption() |
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66 | { |
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67 | // Memory management of materialAlgo needs better thought (MGP) |
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68 | delete _materialAlgo; |
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69 | // Who owns it? Memory management is not clear... (MGP) |
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70 | // _absorptionProducts->clearAndDestroy(); |
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71 | delete _absorptionProducts; |
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72 | } |
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73 | |
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74 | G4DynamicParticleVector* G4PiMinusStopAbsorption::DoAbsorption() |
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75 | { |
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76 | std::vector<G4ParticleDefinition*>* defNucleons = _materialAlgo->DefinitionVector(); |
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77 | |
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78 | G4double newA = _nucleusA; |
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79 | G4double newZ = _nucleusZ; |
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80 | |
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81 | if (defNucleons != 0) |
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82 | { |
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83 | for (unsigned int i=0; i<defNucleons->size(); i++) |
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84 | { |
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85 | if ( (*defNucleons)[i] == G4Proton::Proton()) |
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86 | { |
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87 | newA = newA - 1; |
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88 | newZ = newZ - 1; |
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89 | } |
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90 | if ((*defNucleons)[i] == G4Neutron::Neutron()) |
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91 | { newA = newA - 1; } |
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92 | } |
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93 | } |
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94 | |
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95 | G4double binding = G4NucleiProperties::GetBindingEnergy(static_cast<G4int>(_nucleusA) ,static_cast<G4int>(_nucleusZ)) / _nucleusA; |
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96 | G4double mass = G4NucleiProperties::GetNuclearMass(static_cast<G4int>(newA),static_cast<G4int>(newZ)); |
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97 | |
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98 | |
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99 | std::vector<G4LorentzVector*>* p4Nucleons = _materialAlgo->P4Vector(binding,mass); |
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100 | |
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101 | if (defNucleons != 0 && p4Nucleons != 0) |
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102 | { |
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103 | unsigned int nNucleons = p4Nucleons->size(); |
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104 | |
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105 | G4double seen = _materialAlgo->FinalNucleons() / 2.; |
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106 | G4int maxN = nNucleons; |
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107 | if (defNucleons->size() < nNucleons) { maxN = defNucleons->size(); } |
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108 | |
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109 | for (G4int i=0; i<maxN; i++) |
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110 | { |
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111 | G4DynamicParticle* product; |
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112 | if ((*defNucleons)[i] == G4Proton::Proton()) |
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113 | { product = new G4DynamicParticle(G4Proton::Proton(),*((*p4Nucleons)[i])); } |
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114 | else |
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115 | { product = new G4DynamicParticle(G4Neutron::Neutron(),*((*p4Nucleons)[i])); } |
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116 | G4double ranflat = G4UniformRand(); |
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117 | |
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118 | if (ranflat < seen) |
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119 | { _absorptionProducts->push_back(product); } |
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120 | else |
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121 | { delete product; } |
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122 | } |
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123 | } |
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124 | |
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125 | return _absorptionProducts; |
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126 | |
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127 | } |
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128 | |
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129 | G4ThreeVector G4PiMinusStopAbsorption::RecoilMomentum() |
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130 | { |
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131 | G4ThreeVector pProducts(0.,0.,0.); |
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132 | |
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133 | for (unsigned int i = 0; i< _absorptionProducts->size(); i++) |
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134 | { |
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135 | pProducts = pProducts + (*_absorptionProducts)[i]->GetMomentum(); |
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136 | } |
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137 | return pProducts; |
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138 | } |
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139 | |
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140 | |
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141 | G4int G4PiMinusStopAbsorption::NProtons() |
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142 | { |
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143 | G4int n = 0; |
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144 | G4int entries = _absorptionProducts->size(); |
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145 | for (int i = 0; i<entries; i++) |
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146 | { |
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147 | if ((*_absorptionProducts)[i]->GetDefinition() == G4Proton::Proton()) |
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148 | { n = n + 1; } |
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149 | } |
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150 | return n; |
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151 | } |
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152 | |
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153 | |
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154 | G4int G4PiMinusStopAbsorption::NNeutrons() |
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155 | { |
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156 | G4int n = 0; |
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157 | G4int entries = _absorptionProducts->size(); |
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158 | for (int i = 0; i<entries; i++) |
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159 | { |
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160 | if ((*_absorptionProducts)[i]->GetDefinition() == G4Neutron::Neutron()) |
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161 | { n = n + 1; } |
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162 | } |
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163 | return n; |
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164 | } |
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165 | |
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166 | |
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167 | G4double G4PiMinusStopAbsorption::Energy() |
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168 | { |
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169 | G4double energy = 0.; |
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170 | G4double productEnergy = 0.; |
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171 | G4ThreeVector pProducts(0.,0.,0.); |
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172 | G4int nN = 0; |
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173 | G4int nP = 0; |
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174 | |
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175 | |
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176 | G4int nAbsorptionProducts = _absorptionProducts->size(); |
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177 | |
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178 | for (int i = 0; i<nAbsorptionProducts; i++) |
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179 | { |
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180 | productEnergy += (*_absorptionProducts)[i]->GetKineticEnergy(); |
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181 | pProducts = pProducts + (*_absorptionProducts)[i]->GetMomentum(); |
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182 | if ((*_absorptionProducts)[i]->GetDefinition() == G4Neutron::Neutron()) nN++; |
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183 | if ((*_absorptionProducts)[i]->GetDefinition() == G4Proton::Proton()) nP++; |
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184 | } |
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185 | |
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186 | G4double productBinding = (G4NucleiProperties::GetBindingEnergy(static_cast<G4int>(_nucleusA),static_cast<G4int>(_nucleusZ)) / _nucleusA) * nAbsorptionProducts; |
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187 | G4double mass = G4NucleiProperties::GetNuclearMass(_nucleusA - (nP + nN),_nucleusZ - nP); |
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188 | G4double pNucleus = pProducts.mag(); |
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189 | G4double eNucleus = std::sqrt(pNucleus*pNucleus + mass*mass); |
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190 | G4double tNucleus = eNucleus - mass; |
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191 | G4double temp = |
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192 | G4NucleiProperties::GetBindingEnergy(static_cast<G4int>(_nucleusA - (nP + nN)),static_cast<G4int>(_nucleusZ - nP)) - |
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193 | G4NucleiProperties::GetBindingEnergy(static_cast<G4int>(_nucleusA),static_cast<G4int>(_nucleusZ)); |
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194 | energy = productEnergy + productBinding + tNucleus; |
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195 | |
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196 | if (_level > 0) |
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197 | { |
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198 | std::cout << "E products " << productEnergy |
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199 | << " Binding " << productBinding << " " << temp << " " |
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200 | << " Tnucleus " << tNucleus |
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201 | << " energy = " << energy << G4endl; |
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202 | } |
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203 | |
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204 | return energy; |
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205 | } |
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206 | |
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207 | void G4PiMinusStopAbsorption::SetVerboseLevel(G4int level) |
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208 | { |
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209 | _level = level; |
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210 | return; |
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211 | } |
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